Microcapsule type additive for corrosion-resistant coating and preparation method thereof

An anti-corrosion coating and microcapsule technology, applied in the field of coatings, can solve the problems of not ensuring the uniform distribution of two kinds of microcapsules, reducing the uniform distribution of corrosion inhibitors, and unable to repair mechanical damage independently, saving manpower and material resources, and improving anti-corrosion. performance, the effect of extending the protection time

Active Publication Date: 2015-09-23
BAUHINIA PAINTS SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention cannot guarantee the uniform distribution of the two microcapsules, which reduces the uniform distribution of the corrosion inhibitor in the outflowing film-forming material and reduces the performance of corrosion inhibition. At the same time, one more component will increase the complexity of the process and will Cause some trouble for later painting
[0009] It can be seen from the above that the shortcomings of the existing technology are mainly that they cannot repair mechanical damage independently, or can only repair tiny cracks that are not detectable by the naked eye, and are powerless to slightly obvious damage; there are also disadvantages such as complicated process, time-consuming and labor-intensive technology.

Method used

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  • Microcapsule type additive for corrosion-resistant coating and preparation method thereof
  • Microcapsule type additive for corrosion-resistant coating and preparation method thereof
  • Microcapsule type additive for corrosion-resistant coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 1) Dissolve 1g of non-ionic emulsifier Tween80 in 150g of water and put it in a 500ml four-necked flask;

[0058] 2) Mix 30g of tung oil (containing 1 / 10,000 rare earth drier) and 0.5g of self-made rust inhibitor Yipsa evenly, and add slowly under high-speed stirring to form a stable dispersion;

[0059] 3) Adjust the pH of the dispersion to 4.5, add 100 g of an aqueous solution of melamine-formaldehyde prepolymer (wt%=30%) to it, maintain the temperature at 70° C., and react for 4 hours to form microcapsules;

[0060] 4) Filtering, washing and drying the prepared microcapsules to form a microcapsule additive.

[0061] The SEM photo of the microcapsules that this embodiment prepares is as figure 1 shown. The particle size of the microcapsules prepared in this embodiment is almost all below 50 μm, which can be added to the coating more conveniently.

[0062] Paint blending, coating and paint film performance inspection experiments:

[0063] The present invention uses...

Embodiment 2

[0066] 1) Dissolve 1g of non-ionic emulsifier Tween80 in 150g of water and put it in a 500ml four-necked flask;

[0067] 2) Mix 30g of tung oil (containing 1 / 10,000 rare earth drier) and 1g of self-made rust inhibitor Yipsa evenly, and add slowly under high-speed stirring to form a stable dispersion;

[0068] 3) Adjust the pH of the dispersion to 4.5, add 100 g of an aqueous solution of melamine-formaldehyde prepolymer (wt%=30%) to it, maintain the temperature at 70° C., and react for 4 hours to form microcapsules;

[0069] 4) Filtering, washing and drying the prepared microcapsules to form a microcapsule additive.

Embodiment 3

[0071] 1) Dissolve 1g of non-ionic emulsifier Tween80 in 150g of water and put it in a 500ml four-necked flask;

[0072] 2) Mix 30g of tung oil (containing 1 / 10,000 rare earth drier) and 2g of self-made rust inhibitor Yipsa evenly, and add slowly under high-speed stirring to form a stable dispersion;

[0073] 3) Adjust the pH of the dispersion to 4.5, add 100 g of an aqueous solution of melamine-formaldehyde prepolymer (wt%=30%) to it, maintain the temperature at 70° C., and react for 4 hours to form microcapsules;

[0074] 4) Filtering, washing and drying the prepared microcapsules to form a microcapsule additive.

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Abstract

The invention discloses a microcapsule type additive for corrosion-resistant coating and a preparation method thereof. The microcapsule type additive is prepared by the following components by weight percent, 40wt-80wt% of water, 5wt%-35wt% of air-drying type film-forming substance, 0.01wt%-10wt% of anti-rusting agent, 5wt%-30wt% of capsule-wall resin and 0.05wt%-2wt% of emulsifying agent; the mixture of the air-drying film-forming substance and the anti-rusting agent is wrapped in the capsule-wall resin which is urea resin, melamine-formaldehyde resin or modified polymer of the urea resin and melamine-formaldehyde resin or mixture of two or more than two substances. The additive disclosed by the invention has the advantages that the additive is added into the corrosion-resistant coating, the corrosion resistance of the prepared coating can be further improved, especially when the paint film is damaged due to action of external force, the added additive can release a restoration agent and the anti-rusting agent to restore the damage and inhibit the corrosion expansion by self, so that the service life of the paint film is prolonged.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a microcapsule additive capable of prolonging the service life of anti-corrosion coatings and a preparation method thereof. Background technique [0002] It is estimated that the global economic losses caused by corrosion amount to hundreds of billions of dollars every year, so the corrosion and protection of metal materials have always been the focus of people's research. In the field of anti-corrosion, the use of coatings has a long history and is widely used, and it is the main means of anti-corrosion of metal materials, especially ferrous metal materials. However, general coatings will inevitably encounter accidental mechanical damage during use, or damage due to various reasons after a period of use. If these wounded parts of the metal protective layer are allowed to be exposed to the corrosive environment and not repaired in time, it will inevitably cause local corrosion and corros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C09D5/08C09D163/00B01J13/02
CPCB01J13/02C09D5/08C09D7/63C09D7/65C09D163/00
Inventor 姜美佳林安沈辰中吴四五
Owner BAUHINIA PAINTS SHANGHAI CO LTD
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